For the lipid-aqueous bond:

• 2 large egg yolks (at room temperature)
• 1 cup neutral oil (grapeseed or refined avocado oil)
• 1 tbsp fresh lemon juice
• 1 tsp Dijon mustard (acts as a secondary stabilizer)

For the high-shear toolkit:

• High-speed immersion blender or smart processor
• Narrow, tall-walled blending vessel
• Digital thermometer (to monitor friction-induced heat)

Molecular layering:
‍Add the egg yolks, lemon juice, and Dijon mustard to the base of your blending vessel. Slowly pour the oil over the top. Because of the density differential, the oil will sit in a distinct layer above the aqueous ingredients. This layering is the "launchpad" for the automation—do not stir or disturb the layers before the blades are engaged.

The high-shear startup:
‍Lower the immersion blender to the very bottom of the vessel, making firm contact with the base. Engage the highest speed setting. For the first 10 seconds, do not move the blender. This creates a localized, high-shear environment where a "mother emulsion" is formed at the blade level before the rest of the oil is introduced.

Controlled integration:
‍Once you see a thick, white base forming at the bottom, slowly tilt and lift the blender head by mere millimeters. This movement pulls the top layer of oil into the high-shear zone at a mathematically consistent rate that manual whisking cannot replicate. Continue this micro-lifting until all oil is fully integrated into the matrix.

Thermal stability check:
‍Use your digital thermometer to ensure the friction from the blades hasn't pushed the emulsion above 30°C (86°F). Excessive heat at this stage will cause the microscopic oil droplets to coalesce, resulting in a "broken" sauce. Once a stiff peak is achieved, store in a chilled glass container to lock the molecular bond.